Why can fortune tellers work out the past?

1, the master told all the newcomers the same story, such as there is a big tree behind the house. I was shocked and admired when I said it right, and laughed it off when I said it wrong. No one cares, and over time, there is a survivor bias effect.

In ancient times, tricks were used to deceive people. This is a way for gangs to make a living. Pick a person and observe for a long time to get something unlucky. Then the so-called fortune teller spoke.

3, fortune telling is a lie, nothing is counted, everything is done by people.